Ethereum Dapps are fully compatible with Shift. The decision to keep compatibility was made early on.

We have not received any response from Poloniex so far. As we said after the relaunch, we want to keep working on a few more releases before we start another attempt at getting listed on Poloniex. For our size Bittrex has sufficient volume and we currently can't afford to spread that across many exchanges.

We will be doing everything in our power to get listed on Poloniex eventually, but there is a lot the community can do to support us. Let them know we are an active and innovative coin with a unique concept in crypto, it might influence their decision.